Ferrous sulfate is a soil conditioner, it is not a fertilizer. Many of the potted flowers raised at home are basically southern. They prefer slightly acidic soils. Ferrous sulfate is often used to regulate the soil, so that the soil becomes the slightly acidic soil of the native environment, so that the flowers will flourish.
After a long time of flowering in pots, it is easy to encounter soil compaction. The problem of soil alkalinization of the soil with white alkali will seriously affect the growth of plants, so that it appears iron-deficient yellow leaves, lack of hormones, and stiff seedlings are not long. Ferrous sulfate must be taken care of when using. If you use it wrong, it will make the leaves blacken and burn the seedlings. The correct usage is as follows
First, use skills
Ferrous sulfate is soluble in water, generally in accordance with the ratio of 1:1000 to water the plant after melting, but it is particularly easy to oxidize, melt about 10 minutes, the inside will become yellow-brown, which is to become trivalent iron, poured into the flower is not easy to absorb,
After normal ferrous sulfate melts, the color is pale green. When using ferrous sulfate, it should be poured within 10 minutes after melting, the time is long, oxidized, and then poured after the effect is no effect.
You can also add a few drops of vinegar to the ferrous sulfate, and the acetic acid inside it can relieve oxidation. Make it pale green in color all the time, so you can use it whenever you want. Citric acid can also be used, which is also an acidic substance, and now has to be used in conjunction with ferrous sulfate. The main content of the ferrous sulfate mate is citric acid.
Put a spoonful of citric acid and a spoonful of ferrous sulfate when using, so that there will be no oxidation for 10 days and 8 days, and no matter when it is poured, it is a light green solution. After watering, the plant can absorb quickly. Some friends feel that their use of ferrous sulfate does not work, it is likely to be poured in the state of oxidation
Second, the method of use
Generally, ferrous sulfate is used by the method of root irrigation. After melting, it is watered in the soil, about once a month during the growth period of the plant or once every two months, and ferrous sulfate is a trace element that is not abundant in the soil. If you use too much, it is stacked in a pot, it can not absorb it and it is easy to burn the seedlings, and the leaves appear black-brown. Some directly die warped, so the amount of ferrous sulfate should not be too much, of course, if the lack of ferrous sulfate is a substance. Microbial deficiencies in the soil. It is mainly to promote plant photosynthesis to make the leaves oily green. After the deletion, the leaves will gradually appear green veins and yellow leaves. This is typical of iron deficiency yellow leaves.
Other friends use ferrous sulfate to spray leaves. This method must be carried out in a well-ventilated condition, after spraying it can allow it to dry quickly, do not leave spots. Otherwise, the ferrous sulfate solution cannot be dried for a long time, and black spots will form on the leaves. The leaves cannot be restored, affecting the ornamental value, and there are some fluffy plants, such as rhododendrons. It is not easy to dry quickly after spraying wetting. It can also cause the phenomenon of burning seedlings
The right use of ferrous sulfate is a treasure, if used wrong, it is a deadly medicine.